<em>Answer:</em>
- PbS are not soluble in water.
<em>Solubility rule:</em> "<em>Like dissolve like</em>"
<em>Reason of insolubility of PbS.</em>
- When sulphides are attached with group one and group two elements of periodic table, they are soluble but when they are attached with transition metals like Pb, there is highly covalent bond which makes difficult dissociation of bonds in water.
- KClO2 and NH4Br are inoic substances , so they are easily soluble. HNO2 is weak acid which can ionize in water.
21.28s
Explanation:
This is a rate problem.
Number of parts produced = 225
Time taken to produce= 8hours
Rate of production is the amount of parts produced in a duration of time.
Now convert 8 hours to minute;
60 minutes = 1hr
8 hours = 60 x 8 = 480minutes
Now:
Rate of production = = 0.47parts/minute
Now, to produce 10 parts;
It takes;
0.47 parts to be produced in 1 minute
10 parts would be produced in = 21.28s
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Answer:
1. Carbon?
2. C
3. Oceans
4. Not sure :C
5. Most diamonds are colorless, but are in a range of pale yellow or brown color that is termed the normal color range.
6. I think its refraction.
Explanation: